Cannot find 'extensions/cocos-ext.h' VS2012 Express

I’m using cocos2d-x 3.0alpha1, CocosBuilder, and Visual Studio 2012 Express.
When I try to include the extensions header file, I get the following error:

fatal error C1083: Cannot open include file: 'extensions/cocos-ext.h': No such file or directory 

When I open the cocos2d-x solution, it works properly with the #include "extensions/cocos-ext.h" line, but not on the project I created. I created the project using python create_project.py. Any help?

I also have this question, hoping someone solved it

Add on the ‘Additional Include Directories’ Properties page this path on VS:
$(EngineRoot)

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